Rav Avigdor Miller zt’l said that 99% of divorces in the Orthodox community were preventable and should not have happened. He also often said a difficult marriage is better to maintain than getting divorced, which is usually more difficult than a difficult marriage and often results in a second marriage (if the person even has the mazal to be able to get remarried) that is no better and frequently worse than the first marriage. He said all this no later than the 1980s. His thoughts on this are available to hear from himself on his Torah Tapes and read in his numerous seforim. By now I would venture it is closer to 99.9%.
